package com.usian.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
public class DemoController {
    @RequestMapping("/show")
    public String error1(HttpServletRequest model){
        //model.setAttribute("dianhuahao",123456789);
        String str = null;
        str.length();
        return "text";
    }

}
